Double Star Calculator - Results


BU 137 AB - Astrometric and kinematic properties
Gaia Source ID - Star A          : 2094001134684220800     Simbad
Gaia Source ID - Star B          : 2094001138979921408     Simbad
Observation Epoch : J2025.491 / 2025-06-29 Angular Separation : 1.603 ± 0.0003 arcsec Position Angle : 166.41 ± 0.0112 degree
Star A/B Epoch : J2016.000 / J2016.000 Angular Separation : 1.584 < 0.0001 arcsec Position Angle : 164.18 ± 0.0007 degree Projected Separation : 166 au Spatial Separation : 2.62 ± 0.99 ly Spatial Separation : 165502 ± 62892 au Parallax Significance : 2.63 σ ΔProper Motion Angle : 8.44 ± 0.04 degree ΔTotal Proper Motion : 0.91 ± 0.03 mas/yr ΔTangential Velocity : 0.63 ± 0.07 km/s ΔRelative Velocity (2D) : 3.41 ± 0.04 km/s

Aladin Lite Sky Atlas



Star A - Stellar Data
Gaia Source ID                   : 2094001134684220800           VizieR
Epoch : J2016.000 Right Ascension (RA) : 18h 53m 57.53s Declination (Dec) : 37° 22' 50.99" Distance : 105.08 ± 0.21 pc Distance : 342.71 ± 0.68 ly Magnitude (G-band) : 8.49 mag Absolute Magnitude : 3.21 ± 0.04 mag Stellar Extinction : 0.17 ± 0.04 mag Spectral Type (BP/RP) : G Bolometric correction : -0.10 mag Luminosity : 4.50 + 0.18 / − 0.17 L☉ Log(Luminosity) : 0.65332 Effective temperature (Teff) : 5895.78 +107.76 / -68.94 K Log(Teff) : 3.77054 Mass estimation : 1.33 M☉ RUWE : 1.11 Position Angle of Proper Motion : 340.46 ± 0.02 degree Total Proper Motion : 46.38 ± 0.02 mas/yr Tangential Velocity : 23.10 ± 0.05 km/s Radial Velocity (Gaia) : -62.08 ± 0.23 km/s Space Velocity : 66.24 ± 0.21 km/s

Star A - Selected astrophysical parameters
DSC-Combmod binary star          :       0.00
DSC-Specmod binary star          :       0.05
Radius from GSP-Phot Aeneas      :       1.89  ±   0.03          R☉
Spectral type from ESP-ELS       :          G
Radius of the star from FLAME    :       1.86  ±   0.03          R☉
Bolometric correction            :       0.09                    mag
Luminosity of the star (FLAME)   :       3.75  ±   0.10          L☉
Mass of the star from FLAME      :       1.19  ±   0.04          M☉
FLAME quality indicators         :         00
  Quality                        :       OK
  Source                         :       Parallax used
Evolutionary stage from FLAME    :        416      Main Sequence (late)

Star A - Double Star Quality Metrics
Parallax over error :    502.148 : very good
RUWE                :      1.110 : good astrometric fit (single star)
Non Single Star     :            : Single Star
Duplicated source   :      false : single source
G magnitude         :      8.488 : G > 3 mag, photometry reliable
Excess noise        :      0.134 : Good fit
  Significance      :     16.224 :   Minor noise, likely negligible
BP-RP excess factor :      1.431 : photometry inconsistent
Visibility periods  :         25 : high, indicates well observed star
IPD multi-peak frac :        20% : mulitple peaks detected (possible double)
IDP GoF harmonic amp:      0.025 : unobtrusive (single star source)


Star B - Stellar Data
Gaia Source ID                   : 2094001138979921408           VizieR
Epoch : J2016.000 Right Ascension (RA) : 18h 53m 57.56s Declination (Dec) : 37° 22' 49.47" Distance : 104.27 ± 0.22 pc Distance : 340.09 ± 0.72 ly Magnitude (G-band) : 8.84 mag Absolute Magnitude : 3.74 ± 0.01 mag Stellar Extinction : 0.01 ± 0.01 mag Spectral Type (BP/RP) : G Bolometric correction : -0.10 mag Luminosity : 2.76 + 0.02 / − 0.02 L☉ Log(Luminosity) : 0.44132 Effective temperature (Teff) : 5569.60 +14.43 / - 8.84 K Log(Teff) : 3.74582 Mass estimation : 1.22 M☉ RUWE : 1.42 Position Angle of Proper Motion : 332.02 ± 0.03 degree Total Proper Motion : 45.46 ± 0.02 mas/yr Tangential Velocity : 22.47 ± 0.05 km/s

Star B - Selected astrophysical parameters
DSC-Combmod binary star          :       0.00
DSC-Specmod binary star          :       0.09
Radius from GSP-Phot Aeneas      :       1.71  ±   0.00          R☉
Spectral type from ESP-ELS       :          G
Radius of the star from FLAME    :       1.67  ±   0.03          R☉
Bolometric correction            :       0.03                    mag
Luminosity of the star (FLAME)   :       2.42  ±   0.02          L☉
Mass of the star from FLAME      :       1.03  ±   0.04          M☉
FLAME quality indicators         :         00
  Quality                        :       OK
  Source                         :       Parallax used
Evolutionary stage from FLAME    :        458      Subgiant Branch

Star B - Double Star Quality Metrics
Parallax over error :    470.179 : very good
RUWE                :      1.420 : poor astrometric fit, (possible double)
Non Single Star     :            : Single Star
Duplicated source   :      false : single source
G magnitude         :      8.842 : G > 3 mag, photometry reliable
Excess noise        :      0.156 : Good fit
  Significance      :     24.036 :   Minor noise, likely negligible
BP-RP excess factor :      1.590 : photometry inconsistent
Visibility periods  :         24 : high, indicates well observed star
IPD multi-peak frac :        16% : mulitple peaks detected (possible double)
IDP GoF harmonic amp:      0.016 : unobtrusive (single star source)

Hertzsprung-Russell Diagram of the Double-Star
Positions of both components within the HRD, either derived from calculated luminosities and
effective temperatures (Teff) from the Gaia GSP-Phot Aeneas library (plotted as solid circles)
or estimated from the color index (bp_rp) measured by Gaia (plotted as open circles).


Double Star plausibility checks
Common Proper Motion

Classification acc. to Harshaw     :
===================================
rPM (Proper Motion Ratio)          :        0.15     (CPM)

Co-Moving

UWLE for Co-Moving Pairs (3D)      :
===================================
COMOV: Velocity Evidence Indicator :        0.63     (Moderate)
COMOV: Distance Evidence Indicator :        0.53     (Moderate)
Co-Moving Total Evidence Indicator :        0.58     (Moderate)

rPM/COMOV Agreement                :                 (Moderate)

Binarity

Separation, Sigma and Reliability  :
===================================
Projected Separation               :         166     au
Spatial Separation                 :      165502  ±    62892  au
  1-Sigma Range                    : [    102610,     228395] au
  Significance                     :        2.63     σ
  Note: 3D distance not significantly resolved

3D spatial distance probabilities : =================================== P(D-3D <= 332 au) : 0.0 % (2.0 * D-projected) P(D-3D <= 1000 au) : 0.0 % (Intermediate) P(D-3D <= 2500 au) : 0.0 % (Wide binary) P(D-3D <= 10000 au) : 0.2 % (Wide binary) P(D-3D <= 20000 au) : 0.6 % (Very wide binary) P(D-3D <= 50000 au) : 2.9 % (Extremely wide) P(D-3D <= 206265 au) : 74.0 % (Jacobi radius)

Proper Motion and Velocity         :
===================================
rPM (Proper Motion Ratio)          :        0.15     (CPM)
ΔRelative Velocity (2D)            :        3.41  ±  0.04   km/s

UWLE for Wide Binaries (3D)        :
===================================
WBS: Velocity Evidence Indicator   :        0.00     (Unlikely)
WBS: Distance Evidence Indicator   :        0.00     (Unlikely)
Binarity Total Evidence Indicator  :        0.00     (Unlikely)


UWLE for Wide Binaries (2D)        :
===================================
WBS: Velocity Evidence Indicator   :        0.65     (Moderate)
WBS: Distance Evidence Indicator   :        0.30     (Moderate)
Binarity Total Evidence Indicator  :        0.44     (Moderate)

Orbital & Binding Dynamics         :
-----------------------------------
Est. orbital period at lower bound :     1160.60            years
Escape Velocity                    :        5.22            km/s (Bound)
2D Velocity Difference             :        3.41  ±  0.04   km/s
Circular Orbital Velocity          :        3.69            km/s
Binding Indicator η                :        0.43     (Strongly Bound)
  η < 0.5 : Strongly bound / 0.5 ≤ η < 1.0: Bound / η ≥ 1.0 : Unbound

UWLE for Tight Binaries (2D) : =================================== TBS: Velocity Evidence Indicator : 0.65 (Moderate) TBS: Distance Evidence Indicator : 0.97 (Strong) Binarity Total Evidence Indicator : 0.79 (Strong) Orbital & Binding Dynamics : ----------------------------------- Est. orbital period at lower bound : 1160.60 years Escape Velocity : 5.22 km/s (Bound) 2D Velocity Difference : 3.41 ± 0.04 km/s Circular Orbital Velocity : 3.69 km/s Binding Indicator η : 0.43 (Strongly Bound) η < 0.5 : Strongly bound / 0.5 ≤ η < 1.0: Bound / η ≥ 1.0 : Unbound
UWLE Evidence Indicators - Parametrization:
===========================================
Mode                 Condition  s0         v0              Δx         Uncertainty
---------------------------------------------------------------------------------
Co-Moving                -         1.0 pc    5 km/s        spatial    σspatial
Wide Binaries (3D)       -      20,000 au  ∝√1/dspatial     spatial    σspatial
Wide Binaries (2D)   RI < 3.0   20,000 au  ∝√1/dprojected   projected  σspatial
Tight Binaries (2D)  RI < 3.0    1,000 au  ∝√1/dprojected   projected  σprojected

Metallicity (Experimental / Not validated)

Metallicity (Gaia DR3, GSP-Phot)   :
===================================
Metallicity Star A - [M/H]         :     -0.0105  ± 0.0755 dex
  Metallicity reliability factor A :        0.33
Metallicity Star B - [M/H]         :     -0.6738  ± 0.0166 dex
  Metallicity reliability factor B :        0.54
Metallicity Difference             :      0.6633           dex
Combined uncertainty               :      0.2238           dex
Sigma-Distance (Z-Score)           :      2.96 σ
  Compatibility                    :  Marginal (possible agreement)

Note: For close visual binaries (<5"), Gaia DR3 GSP-Phot metallicities
should be treated with caution due to possible BP/RP spectral contamination.

Note: Z-Score calculation accounts for a 0.21 dex systematic uncertainty
      floor based on Gaia DR3 GSP-Phot validation studies

-- Experimental module – results are preliminary and not validated --

RUWE parameters
RUWE probability for a binary system (Star A) :  1.11 : Zero
RUWE probability for a binary system (Star B) :  1.42 : Medium

Separation and position angle as a function of Julian Epoch
Note: Separation and position angle for different epochs are derived solely
from Gaia proper motion measurements; possible orbital motion is not considered.

-- For epoch J[1900-2100], computed using Gaia proper motions --

Click to expand/collapse - Separation and Position Angle for J-Epoch:
Epoch      Sep[″]   e_Sep[″]    PA[°]     e_PA[°]
-------------------------------------------------
1900.0      1.568    0.004     135.132    0.123
1901.0      1.567    0.004     135.375    0.122
1902.0      1.565    0.004     135.618    0.122
1903.0      1.564    0.004     135.861    0.121
1904.0      1.562    0.003     136.105    0.120
1905.0      1.561    0.003     136.349    0.119
1906.0      1.559    0.003     136.594    0.119
1907.0      1.558    0.003     136.839    0.118
1908.0      1.557    0.003     137.085    0.117
1909.0      1.555    0.003     137.331    0.116
1910.0      1.554    0.003     137.578    0.115
1911.0      1.553    0.003     137.824    0.114
1912.0      1.552    0.003     138.072    0.114
1913.0      1.550    0.003     138.319    0.113
1914.0      1.549    0.003     138.568    0.112
1915.0      1.548    0.003     138.816    0.111
1916.0      1.547    0.003     139.065    0.110
1917.0      1.546    0.003     139.314    0.109
1918.0      1.545    0.003     139.564    0.108
1919.0      1.544    0.003     139.814    0.107
1920.0      1.543    0.003     140.064    0.107
1921.0      1.542    0.003     140.315    0.106
1922.0      1.541    0.003     140.566    0.105
1923.0      1.540    0.003     140.817    0.104
1924.0      1.539    0.003     141.068    0.103
1925.0      1.538    0.003     141.320    0.102
1926.0      1.537    0.003     141.572    0.101
1927.0      1.536    0.003     141.825    0.100
1928.0      1.535    0.003     142.077    0.099
1929.0      1.535    0.003     142.330    0.098
1930.0      1.534    0.003     142.583    0.097
1931.0      1.533    0.003     142.837    0.096
1932.0      1.533    0.003     143.090    0.095
1933.0      1.532    0.003     143.344    0.094
1934.0      1.531    0.003     143.598    0.093
1935.0      1.531    0.002     143.852    0.092
1936.0      1.530    0.002     144.106    0.091
1937.0      1.530    0.002     144.361    0.090
1938.0      1.529    0.002     144.616    0.089
1939.0      1.529    0.002     144.871    0.088
1940.0      1.528    0.002     145.126    0.087
1941.0      1.528    0.002     145.381    0.086
1942.0      1.528    0.002     145.636    0.085
1943.0      1.527    0.002     145.892    0.084
1944.0      1.527    0.002     146.147    0.083
1945.0      1.527    0.002     146.403    0.082
1946.0      1.526    0.002     146.658    0.081
1947.0      1.526    0.002     146.914    0.080
1948.0      1.526    0.002     147.170    0.079
1949.0      1.526    0.002     147.426    0.078
1950.0      1.526    0.002     147.682    0.077
1951.0      1.526    0.002     147.938    0.076
1952.0      1.526    0.002     148.194    0.075
1953.0      1.526    0.002     148.450    0.074
1954.0      1.526    0.002     148.706    0.073
1955.0      1.526    0.002     148.962    0.071
1956.0      1.526    0.002     149.218    0.070
1957.0      1.526    0.002     149.474    0.069
1958.0      1.526    0.002     149.730    0.068
1959.0      1.526    0.002     149.986    0.067
1960.0      1.526    0.002     150.242    0.066
1961.0      1.526    0.002     150.497    0.065
1962.0      1.527    0.002     150.753    0.064
1963.0      1.527    0.002     151.009    0.063
1964.0      1.527    0.002     151.264    0.061
1965.0      1.528    0.002     151.520    0.060
1966.0      1.528    0.001     151.775    0.059
1967.0      1.528    0.001     152.030    0.058
1968.0      1.529    0.001     152.285    0.057
1969.0      1.529    0.001     152.540    0.056
1970.0      1.530    0.001     152.795    0.055
1971.0      1.530    0.001     153.049    0.053
1972.0      1.531    0.001     153.303    0.052
1973.0      1.531    0.001     153.558    0.051
1974.0      1.532    0.001     153.812    0.050
1975.0      1.533    0.001     154.065    0.049
1976.0      1.533    0.001     154.319    0.048
1977.0      1.534    0.001     154.572    0.046
1978.0      1.535    0.001     154.825    0.045
1979.0      1.535    0.001     155.078    0.044
1980.0      1.536    0.001     155.331    0.043
1981.0      1.537    0.001     155.583    0.042
1982.0      1.538    0.001     155.835    0.041
1983.0      1.539    0.001     156.087    0.039
1984.0      1.540    0.001     156.338    0.038
1985.0      1.541    0.001     156.590    0.037
1986.0      1.542    0.001     156.841    0.036
1987.0      1.543    0.001     157.091    0.035
1988.0      1.544    0.001     157.341    0.033
1989.0      1.545    0.001     157.591    0.032
1990.0      1.546    0.001     157.841    0.031
1991.0      1.547    0.001     158.090    0.030
1992.0      1.548    0.001     158.339    0.029
1993.0      1.549    0.001     158.587    0.027
1994.0      1.550    0.001     158.835    0.026
1995.0      1.552    0.001     159.083    0.025
1996.0      1.553    0.001     159.330    0.024
1997.0      1.554    0.001     159.577    0.023
1998.0      1.556    0.001     159.824    0.022
1999.0      1.557    0.000     160.070    0.020
2000.0      1.558    0.000     160.315    0.019
2001.0      1.560    0.000     160.560    0.018
2002.0      1.561    0.000     160.805    0.017
2003.0      1.563    0.000     161.049    0.016
2004.0      1.564    0.000     161.293    0.014
2005.0      1.566    0.000     161.537    0.013
2006.0      1.567    0.000     161.780    0.012
2007.0      1.569    0.000     162.022    0.011
2008.0      1.570    0.000     162.264    0.010
2009.0      1.572    0.000     162.505    0.008
2010.0      1.574    0.000     162.746    0.007
2011.0      1.575    0.000     162.987    0.006
2012.0      1.577    0.000     163.226    0.005
2013.0      1.579    0.000     163.466    0.004
2014.0      1.580    0.000     163.705    0.002
2015.0      1.582    0.000     163.943    0.001
2016.0      1.584    0.000     164.181    0.001
2017.0      1.586    0.000     164.418    0.001
2018.0      1.588    0.000     164.654    0.002
2019.0      1.590    0.000     164.891    0.004
2020.0      1.592    0.000     165.126    0.005
2021.0      1.594    0.000     165.361    0.006
2022.0      1.596    0.000     165.595    0.007
2023.0      1.598    0.000     165.829    0.008
2024.0      1.600    0.000     166.062    0.009
2025.0      1.602    0.000     166.295    0.011
2026.0      1.604    0.000     166.527    0.012
2027.0      1.606    0.000     166.758    0.013
2028.0      1.608    0.000     166.989    0.014
2029.0      1.610    0.000     167.219    0.015
2030.0      1.612    0.000     167.449    0.016
2031.0      1.615    0.000     167.677    0.018
2032.0      1.617    0.000     167.906    0.019
2033.0      1.619    0.000     168.133    0.020
2034.0      1.621    0.001     168.360    0.021
2035.0      1.624    0.001     168.587    0.022
2036.0      1.626    0.001     168.812    0.023
2037.0      1.628    0.001     169.037    0.024
2038.0      1.631    0.001     169.262    0.026
2039.0      1.633    0.001     169.485    0.027
2040.0      1.636    0.001     169.708    0.028
2041.0      1.638    0.001     169.931    0.029
2042.0      1.641    0.001     170.152    0.030
2043.0      1.643    0.001     170.373    0.031
2044.0      1.646    0.001     170.594    0.032
2045.0      1.648    0.001     170.813    0.033
2046.0      1.651    0.001     171.032    0.035
2047.0      1.654    0.001     171.251    0.036
2048.0      1.656    0.001     171.468    0.037
2049.0      1.659    0.001     171.685    0.038
2050.0      1.662    0.001     171.901    0.039
2051.0      1.664    0.001     172.117    0.040
2052.0      1.667    0.001     172.332    0.041
2053.0      1.670    0.001     172.546    0.042
2054.0      1.672    0.001     172.759    0.043
2055.0      1.675    0.001     172.972    0.044
2056.0      1.678    0.001     173.184    0.045
2057.0      1.681    0.001     173.395    0.047
2058.0      1.684    0.001     173.605    0.048
2059.0      1.687    0.001     173.815    0.049
2060.0      1.690    0.001     174.024    0.050
2061.0      1.693    0.001     174.233    0.051
2062.0      1.696    0.001     174.440    0.052
2063.0      1.699    0.001     174.647    0.053
2064.0      1.702    0.001     174.853    0.054
2065.0      1.705    0.001     175.059    0.055
2066.0      1.708    0.001     175.263    0.056
2067.0      1.711    0.001     175.467    0.057
2068.0      1.714    0.001     175.671    0.058
2069.0      1.717    0.002     175.873    0.059
2070.0      1.720    0.002     176.075    0.060
2071.0      1.723    0.002     176.276    0.061
2072.0      1.726    0.002     176.476    0.062
2073.0      1.730    0.002     176.676    0.063
2074.0      1.733    0.002     176.874    0.064
2075.0      1.736    0.002     177.073    0.065
2076.0      1.739    0.002     177.270    0.066
2077.0      1.743    0.002     177.466    0.067
2078.0      1.746    0.002     177.662    0.068
2079.0      1.749    0.002     177.857    0.069
2080.0      1.753    0.002     178.052    0.070
2081.0      1.756    0.002     178.245    0.071
2082.0      1.759    0.002     178.438    0.072
2083.0      1.763    0.002     178.630    0.073
2084.0      1.766    0.002     178.822    0.074
2085.0      1.770    0.002     179.012    0.075
2086.0      1.773    0.002     179.202    0.076
2087.0      1.777    0.002     179.391    0.077
2088.0      1.780    0.002     179.580    0.077
2089.0      1.784    0.002     179.767    0.078
2090.0      1.787    0.002     179.954    0.079
2091.0      1.791    0.002     180.141    0.080
2092.0      1.794    0.002     180.326    0.081
2093.0      1.798    0.002     180.511    0.082
2094.0      1.802    0.002     180.695    0.083
2095.0      1.805    0.002     180.878    0.084
2096.0      1.809    0.002     181.060    0.085
2097.0      1.812    0.002     181.242    0.086
2098.0      1.816    0.002     181.423    0.086
2099.0      1.820    0.002     181.603    0.087
2100.0      1.824    0.002     181.783    0.088




Measurements for BU 137 AB
 
WDS ID      Discovr     Comp  #    Sep      PA       Epoch      Obs  Telescope     Camera    Note
-------------------------------------------------------------------------------------------------
18540+3723  BU 137      AB    1    1.49"    166.9°   B2025.493  HWI  120/900 APO   ASI678MM  

-- Image of BU-137-AB-taken with Equinox 120/900 APO --


WDS record for BU 137 AB
wds_id                       : 18540+3723
discoverer_code              : BU
discoverer_number            : 137
discoverer_components        : AB
date_first                   : 1873
date_last                    : 2024
num_of_obs                   : 140
pa_first                     : 140
pa_last                      : 167
sep_first                    : 1.5
sep_last                     : 1.6
mag_primary                  : 8.69
mag_secondary                : 9.02
spectral_type                : G5III-IV
primary_proper_motion_RA     : -16
primary_proper_motion_DEC    : 45
secondary_proper_motion_RA   : -16
secondary_proper_motion_DEC  : 45
dm_number                    : +37 3276
notes                        : O
precise_coordinate           : 185357.56+372249.7
                             : 18:53:57.56 +37:22:49.7

WDS Notes:
----------
O: Orbit described in WDSNOT MEMO and has entry in Orbit Catalog


Orbital Elements for BU 137 AB
WDS: BU 137 AB WDS ID/Discoverer
P: 1135.735 Orbital period (years)
a: 3.61436 Semi-major axis (arcseconds)
i: 76.953 Inclination (degrees)
Ω: 177.051 Longitude of ascending node (degrees)
T: 2080.596 Epoch of periastron passage (year)
e: 0.77425 Eccentricity
ω: 69.393 Argument of periastron (degrees)
Start-Year: 1457.132 Year
End-Year: 2592.868 Year
Epoch: 2025.49 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU 137 AB
Position: 185357.56+372249.7 Epoch-2000 right ascension and declination
WDS-ID: 18540+3723 WDS designation
Discoverer Code: BU 137 AB Discover designation and components
ADS number: 11811 Aitken Double Star catalog
HD number: 175491 HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 8.69 Magnitude of the primary
V2: 9.02 Magnitude of the secondary
Equinox: Equinox
Date: 2015 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
8 = Interferometric
9 = Astrometric
Flags: Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for BU 137 AB



WDS 6th Orbit including measures of BU 137 AB

-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --


Legend:
Green plus signs:Visual (micrometric) measures
Violet asterisks:Photographic measures
Blue symbols:Various interferometric techniques
Dot-dash line:Indicates the line of nodes

Ephemeris of BU 137 AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.49    1.515   166.61
--------------------------
1450.00    2.954    23.27
1460.00    2.905    23.96
1470.00    2.856    24.67
1480.00    2.805    25.41
1490.00    2.754    26.18
1500.00    2.701    26.97
1510.00    2.647    27.80
1520.00    2.593    28.66
1530.00    2.538    29.56
1540.00    2.481    30.50
1550.00    2.425    31.48
1560.00    2.367    32.51
1570.00    2.310    33.60
1580.00    2.251    34.73
1590.00    2.193    35.93
1600.00    2.134    37.20
1610.00    2.075    38.53
1620.00    2.016    39.95
1630.00    1.957    41.45
1640.00    1.898    43.04
1650.00    1.840    44.73
1660.00    1.783    46.54
1670.00    1.726    48.46
1680.00    1.670    50.51
1690.00    1.615    52.71
1700.00    1.562    55.05
1710.00    1.510    57.56
1720.00    1.461    60.24
1730.00    1.413    63.11
1740.00    1.369    66.17
1750.00    1.328    69.43
1760.00    1.290    72.88
1770.00    1.255    76.54
1780.00    1.226    80.39
1790.00    1.201    84.41
1800.00    1.180    88.59
1810.00    1.166    92.89
1820.00    1.156    97.28
1830.00    1.152   101.73
1840.00    1.154   106.18
1850.00    1.162   110.59
1860.00    1.174   114.93
1870.00    1.191   119.17
1880.00    1.213   123.26
1890.00    1.239   127.20
1900.00    1.268   130.97
1910.00    1.299   134.56
1920.00    1.333   137.98
1930.00    1.368   141.23
1940.00    1.403   144.31
1950.00    1.437   147.24
1960.00    1.470   150.04
1970.00    1.499   152.73
1980.00    1.525   155.31
1990.00    1.544   157.83
2000.00    1.554   160.29
2010.00    1.552   162.74
2020.00    1.534   165.22
2030.00    1.493   167.79
2040.00    1.418   170.58
2050.00    1.294   173.78
2060.00    1.095   177.90
2070.00    0.785   184.62
2080.00    0.361   205.11
2090.00    0.293   315.73
2100.00    0.744   343.16
2110.00    1.152   349.98
2120.00    1.493   353.40
2130.00    1.778   355.61
2140.00    2.021   357.25
2150.00    2.229   358.56
2160.00    2.410   359.66
2170.00    2.568     0.62
2180.00    2.707     1.47
2190.00    2.829     2.24
2200.00    2.937     2.95
2210.00    3.033     3.61
2220.00    3.117     4.24
2230.00    3.192     4.83
2240.00    3.258     5.40
2250.00    3.316     5.95
2260.00    3.367     6.48
2270.00    3.411     6.99
2280.00    3.450     7.50
2290.00    3.482     7.99
2300.00    3.509     8.47
2310.00    3.531     8.95
2320.00    3.549     9.42
2330.00    3.562     9.89
2340.00    3.571    10.36
2350.00    3.577    10.82
2360.00    3.578    11.28
2370.00    3.577    11.74
2380.00    3.572    12.21
2390.00    3.564    12.67
2400.00    3.553    13.14
2410.00    3.540    13.61
2420.00    3.523    14.08
2430.00    3.505    14.56
2440.00    3.483    15.05
2450.00    3.460    15.54
2460.00    3.434    16.03
2470.00    3.406    16.54
2480.00    3.376    17.06
2490.00    3.344    17.58
2500.00    3.310    18.11
2510.00    3.275    18.66
2520.00    3.238    19.22
2530.00    3.199    19.79
2540.00    3.158    20.37
2550.00    3.116    20.97
2560.00    3.072    21.59
2570.00    3.027    22.23
2580.00    2.981    22.88
2590.00    2.933    23.56
2600.00    2.885    24.26


Parsed GAIA Input Data
Click to expand/collapse the Gaia Input Data:
Star A - gaiadr3.gaia_source
solution_id = 1636148068921376768
designation = Gaia DR3 2094001134684220800
source_id = 2094001134684220800
random_index = 656788811
ref_epoch = 2016.0
ra = 283.4896946424795
ra_error = 0.015218162
dec = 37.38083101376074
dec_error = 0.015771523
parallax = 9.516927918033694
parallax_error = 0.018952427
parallax_over_error = 502.14825
pm = 46.37554
pmra = -15.513882849271464
pmra_error = 0.019926365
pmdec = 43.70366365206958
pmdec_error = 0.02004817
ra_dec_corr = -0.14722411
ra_parallax_corr = -0.220605
ra_pmra_corr = -0.24327448
ra_pmdec_corr = 0.070539385
dec_parallax_corr = 0.17345443
dec_pmra_corr = 0.011481355
dec_pmdec_corr = -0.21871367
parallax_pmra_corr = 0.12946098
parallax_pmdec_corr = -0.34345824
pmra_pmdec_corr = -0.15324193
astrometric_n_obs_al = 331
astrometric_n_obs_ac = 331
astrometric_n_good_obs_al = 328
astrometric_n_bad_obs_al = 3
astrometric_gof_al = 2.7221704
astrometric_chi2_al = 860.18646
astrometric_excess_noise = 0.13383639
astrometric_excess_noise_sig = 16.223888
astrometric_params_solved = 31
astrometric_primary_flag = true
nu_eff_used_in_astrometry = 1.5559659
astrometric_matched_transits = 38
visibility_periods_used = 25
astrometric_sigma5d_max = 0.030430494
matched_transits = 42
new_matched_transits = 16
matched_transits_removed = 0
ipd_gof_harmonic_amplitude = 0.024588816
ipd_gof_harmonic_phase = 177.99544
ipd_frac_multi_peak = 20
ipd_frac_odd_win = 0
ruwe = 1.107924
duplicated_source = false
phot_g_n_obs = 297
phot_g_mean_flux = 7584684.517097457
phot_g_mean_flux_error = 4154.3833
phot_g_mean_flux_over_error = 1825.7064
phot_g_mean_mag = 8.487523
phot_bp_n_obs = 33
phot_bp_mean_flux = 4940320.238813675
phot_bp_mean_flux_error = 143066.62
phot_bp_mean_flux_over_error = 34.531605
phot_bp_mean_mag = 8.604155
phot_rp_n_obs = 28
phot_rp_mean_flux = 5912700.490220148
phot_rp_mean_flux_error = 186305.61
phot_rp_mean_flux_over_error = 31.736567
phot_rp_mean_mag = 7.818431
phot_bp_rp_excess_factor = 1.4309126
phot_bp_n_contaminated_transits = 10
phot_bp_n_blended_transits = 22
phot_rp_n_contaminated_transits = 12
phot_rp_n_blended_transits = 16
phot_proc_mode = 0
bp_rp = 0.7857237
bp_g = 0.11663151
g_rp = 0.6690922
radial_velocity = -62.084644
radial_velocity_error = 0.22547027
rv_method_used = 1
rv_nb_transits = 5
rv_nb_deblended_transits = 3
rv_visibility_periods_used = 5
rv_expected_sig_to_noise = 129.61388
rv_renormalised_gof = 0.7746937
rv_chisq_pvalue = 0.12873864
rv_time_duration = 658.4526
rv_amplitude_robust = 0.87786865
rv_template_teff = 6000.0
rv_template_logg = 4.0
rv_template_fe_h = 0.0
rv_atm_param_origin = 444
grvs_mag = 7.741643
grvs_mag_error = 0.0077050924
grvs_mag_nb_transits = 2
phot_variable_flag = NOT_AVAILABLE
l = 67.3443281967819
b = 15.607967534658867
ecl_lon = 291.63055636153655
ecl_lat = 59.81120792219627
in_qso_candidates = false
in_galaxy_candidates = false
non_single_star = 0
has_xp_continuous = true
has_xp_sampled = true
has_rvs = false
has_epoch_photometry = false
has_epoch_rv = false
has_mcmc_gspphot = true
has_mcmc_msc = true
in_andromeda_survey = false
classprob_dsc_combmod_quasar = 6.320415e-10
classprob_dsc_combmod_galaxy = 9.610212e-10
classprob_dsc_combmod_star = 0.9994306
teff_gspphot = 5895.776
teff_gspphot_lower = 5826.8364
teff_gspphot_upper = 6003.5356
logg_gspphot = 3.9423
logg_gspphot_lower = 3.9237
logg_gspphot_upper = 3.9824
mh_gspphot = -0.0105
mh_gspphot_lower = -0.0558
mh_gspphot_upper = 0.0953
distance_gspphot = 104.9788
distance_gspphot_lower = 104.6948
distance_gspphot_upper = 105.2824
azero_gspphot = 0.1999
azero_gspphot_lower = 0.1616
azero_gspphot_upper = 0.259
ag_gspphot = 0.1683
ag_gspphot_lower = 0.1358
ag_gspphot_upper = 0.2185
ebpminrp_gspphot = 0.0902
ebpminrp_gspphot_lower = 0.0728
ebpminrp_gspphot_upper = 0.1172
libname_gspphot = MARCS
    Star B - gaiadr3.gaia_source
solution_id = 1636148068921376768
designation = Gaia DR3 2094001138979921408
source_id = 2094001138979921408
random_index = 533891580
ref_epoch = 2016.0
ra = 283.48984559532664
ra_error = 0.018524112
dec = 37.38040766441695
dec_error = 0.017000861
parallax = 9.59015995987389
parallax_error = 0.020396821
parallax_over_error = 470.17914
pm = 45.4628
pmra = -21.330179329511033
pmra_error = 0.026829029
pmdec = 40.14834472484163
pmdec_error = 0.020674659
ra_dec_corr = -0.1443343
ra_parallax_corr = -0.07062183
ra_pmra_corr = -0.2531934
ra_pmdec_corr = 0.017964285
dec_parallax_corr = 0.13052092
dec_pmra_corr = -0.009773599
dec_pmdec_corr = -0.27966008
parallax_pmra_corr = 0.036768924
parallax_pmdec_corr = -0.21692792
pmra_pmdec_corr = -0.17160355
astrometric_n_obs_al = 288
astrometric_n_obs_ac = 288
astrometric_n_good_obs_al = 284
astrometric_n_bad_obs_al = 4
astrometric_gof_al = 9.282014
astrometric_chi2_al = 1193.1007
astrometric_excess_noise = 0.15617518
astrometric_excess_noise_sig = 24.036415
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.5587611
astrometric_matched_transits = 33
visibility_periods_used = 24
astrometric_sigma5d_max = 0.038177572
matched_transits = 38
new_matched_transits = 14
matched_transits_removed = 6
ipd_gof_harmonic_amplitude = 0.015949916
ipd_gof_harmonic_phase = 162.65279
ipd_frac_multi_peak = 16
ipd_frac_odd_win = 0
ruwe = 1.4163048
duplicated_source = false
phot_g_n_obs = 235
phot_g_mean_flux = 5474198.688678732
phot_g_mean_flux_error = 2844.0916
phot_g_mean_flux_over_error = 1924.7617
phot_g_mean_mag = 8.841565
phot_bp_n_obs = 27
phot_bp_mean_flux = 3799361.7139088465
phot_bp_mean_flux_error = 200625.98
phot_bp_mean_flux_over_error = 18.937536
phot_bp_mean_mag = 8.889266
phot_rp_n_obs = 25
phot_rp_mean_flux = 4902252.583411137
phot_rp_mean_flux_error = 256492.9
phot_rp_mean_flux_over_error = 19.112625
phot_rp_mean_mag = 8.021906
phot_bp_rp_excess_factor = 1.5895686
phot_bp_n_contaminated_transits = 0
phot_bp_n_blended_transits = 24
phot_rp_n_contaminated_transits = 0
phot_rp_n_blended_transits = 24
phot_proc_mode = 0
bp_rp = 0.8673601
bp_g = 0.047700882
g_rp = 0.81965923
phot_variable_flag = NOT_AVAILABLE
l = 67.34396966501214
b = 15.607694820737452
ecl_lon = 291.63063545178545
ecl_lat = 59.810769708794936
in_qso_candidates = false
in_galaxy_candidates = false
non_single_star = 0
has_xp_continuous = true
has_xp_sampled = true
has_rvs = false
has_epoch_photometry = false
has_epoch_rv = false
has_mcmc_gspphot = true
has_mcmc_msc = true
in_andromeda_survey = false
classprob_dsc_combmod_quasar = 1.1192878e-13
classprob_dsc_combmod_galaxy = 5.590786e-13
classprob_dsc_combmod_star = 0.9990192
teff_gspphot = 5569.604
teff_gspphot_lower = 5560.7686
teff_gspphot_upper = 5584.0303
logg_gspphot = 4.0945
logg_gspphot_lower = 4.0932
logg_gspphot_upper = 4.0964
mh_gspphot = -0.6738
mh_gspphot_lower = -0.6896
mh_gspphot_upper = -0.6564
distance_gspphot = 104.0492
distance_gspphot_lower = 103.8292
distance_gspphot_upper = 104.2765
azero_gspphot = 0.0107
azero_gspphot_lower = 0.0035
azero_gspphot_upper = 0.0225
ag_gspphot = 0.009
ag_gspphot_lower = 0.0029
ag_gspphot_upper = 0.0188
ebpminrp_gspphot = 0.0049
ebpminrp_gspphot_lower = 0.0015
ebpminrp_gspphot_upper = 0.0102
libname_gspphot = MARCS
- gaiadr3.astrophysical_parameters
solution_id = 1636148068921376768
source_id = 2094001134684220800
classprob_dsc_combmod_quasar = 6.320415e-10
classprob_dsc_combmod_galaxy = 9.610212e-10
classprob_dsc_combmod_star = 0.9994306
classprob_dsc_combmod_whitedwarf = 9.753893e-09
classprob_dsc_combmod_binarystar = 0.0005693969
classprob_dsc_specmod_quasar = 5.8628146e-05
classprob_dsc_specmod_galaxy = 1.7839928e-05
classprob_dsc_specmod_star = 0.94598126
classprob_dsc_specmod_whitedwarf = 4.609197e-05
classprob_dsc_specmod_binarystar = 0.053896077
classprob_dsc_allosmod_quasar = 0.0
classprob_dsc_allosmod_galaxy = 0.0
classprob_dsc_allosmod_star = 1.0
teff_gspphot = 5895.776
teff_gspphot_lower = 5826.8364
teff_gspphot_upper = 6003.5356
logg_gspphot = 3.9423
logg_gspphot_lower = 3.9237
logg_gspphot_upper = 3.9824
mh_gspphot = -0.0105
mh_gspphot_lower = -0.0558
mh_gspphot_upper = 0.0953
distance_gspphot = 104.9788
distance_gspphot_lower = 104.6948
distance_gspphot_upper = 105.2824
azero_gspphot = 0.1999
azero_gspphot_lower = 0.1616
azero_gspphot_upper = 0.259
ag_gspphot = 0.1683
ag_gspphot_lower = 0.1358
ag_gspphot_upper = 0.2185
abp_gspphot = 0.2103
abp_gspphot_lower = 0.1699
abp_gspphot_upper = 0.2728
arp_gspphot = 0.1201
arp_gspphot_lower = 0.097
arp_gspphot_upper = 0.1556
ebpminrp_gspphot = 0.0902
ebpminrp_gspphot_lower = 0.0728
ebpminrp_gspphot_upper = 0.1172
mg_gspphot = 3.1669
mg_gspphot_lower = 3.1208
mg_gspphot_upper = 3.2018
radius_gspphot = 1.8937
radius_gspphot_lower = 1.8579
radius_gspphot_upper = 1.9137
logposterior_gspphot = -1643.6855
mcmcaccept_gspphot = 0.3741066
libname_gspphot = MARCS
teff_gspspec = 5954.0
teff_gspspec_lower = 5916.0
teff_gspspec_upper = 5989.0
logg_gspspec = 4.15
logg_gspspec_lower = 4.1
logg_gspspec_upper = 4.18
mh_gspspec = 0.24
mh_gspspec_lower = 0.18
mh_gspspec_upper = 0.28
alphafe_gspspec = 0.09
alphafe_gspspec_lower = 0.07
alphafe_gspspec_upper = 0.1
fem_gspspec = -0.13
fem_gspspec_lower = -0.25
fem_gspspec_upper = -0.0
fem_gspspec_nlines = 8
fem_gspspec_linescatter = 0.12
sife_gspspec = 0.02
sife_gspspec_lower = -0.08
sife_gspspec_upper = 0.14
sife_gspspec_nlines = 3
sife_gspspec_linescatter = 0.06
cafe_gspspec = 0.08
cafe_gspspec_lower = 0.05
cafe_gspspec_upper = 0.1
cafe_gspspec_nlines = 7
cafe_gspspec_linescatter = 0.05
tife_gspspec = 0.32
tife_gspspec_lower = 0.2
tife_gspspec_upper = 0.49
tife_gspspec_nlines = 1
tife_gspspec_linescatter = 0.0
feiim_gspspec = 0.08
feiim_gspspec_lower = -0.14
feiim_gspspec_upper = 0.34
feiim_gspspec_nlines = 1
feiim_gspspec_linescatter = 0.0
sfe_gspspec = 0.11
sfe_gspspec_lower = 0.01
sfe_gspspec_upper = 0.21
sfe_gspspec_nlines = 2
sfe_gspspec_linescatter = 0.12
nfe_gspspec = 0.44
nfe_gspspec_lower = 0.3
nfe_gspspec_upper = 0.57
nfe_gspspec_nlines = 1
nfe_gspspec_linescatter = 0.0
nife_gspspec = 0.33
nife_gspspec_lower = 0.13
nife_gspspec_upper = 0.45
nife_gspspec_nlines = 1
nife_gspspec_linescatter = 0.0
dibqf_gspspec = -1
flags_gspspec = 00000000000001199000000119900021199999999
logchisq_gspspec = -3.965898
ew_espels_halpha = 0.008133127
ew_espels_halpha_uncertainty = 0.23206757
ew_espels_halpha_flag = 0
ew_espels_halpha_model = 0.129287
flags_esphs = 93
spectraltype_esphs = G
activityindex_espcs = -0.011577633
activityindex_espcs_uncertainty = 0.00034019724
activityindex_espcs_input = M1
radius_flame = 1.8576288
radius_flame_lower = 1.8251337
radius_flame_upper = 1.8758456
lum_flame = 3.74576
lum_flame_lower = 3.6613648
lum_flame_upper = 3.871249
mass_flame = 1.1868572
mass_flame_lower = 1.140911
mass_flame_upper = 1.2286694
age_flame = 5.4620714
age_flame_lower = 4.7910523
age_flame_upper = 6.3076944
flags_flame = 00
evolstage_flame = 416
gravredshift_flame = 0.3777125
gravredshift_flame_lower = 0.36683
gravredshift_flame_upper = 0.4028201
bc_flame = 0.08945465
mh_msc = 0.10347982
mh_msc_upper = 0.1836947
mh_msc_lower = 0.037378043
azero_msc = 0.5038831
azero_msc_upper = 0.7713369
azero_msc_lower = 0.3994215
distance_msc = 104.79889
distance_msc_upper = 107.367935
distance_msc_lower = 102.842255
teff_msc1 = 6226.094
teff_msc1_upper = 6331.148
teff_msc1_lower = 5999.654
teff_msc2 = 5005.9805
teff_msc2_upper = 5228.2754
teff_msc2_lower = 4861.327
logg_msc1 = 4.5884376
logg_msc1_upper = 4.8729615
logg_msc1_lower = 3.7869172
logg_msc2 = 4.135297
logg_msc2_upper = 4.163769
logg_msc2_lower = 4.07687
ag_msc = 0.41020334
ag_msc_upper = 0.62283784
ag_msc_lower = 0.32637388
logposterior_msc = 123.67639
mcmcaccept_msc = 0.28288782
mcmcdrift_msc = 0.04816646
flags_msc = 0
    - gaiadr3.astrophysical_parameters
solution_id = 1636148068921376768
source_id = 2094001138979921408
classprob_dsc_combmod_quasar = 1.1192878e-13
classprob_dsc_combmod_galaxy = 5.590786e-13
classprob_dsc_combmod_star = 0.9990192
classprob_dsc_combmod_whitedwarf = 2.1970242e-12
classprob_dsc_combmod_binarystar = 0.0009807887
classprob_dsc_specmod_quasar = 0.0
classprob_dsc_specmod_galaxy = 0.0
classprob_dsc_specmod_star = 0.9105993
classprob_dsc_specmod_whitedwarf = 0.0
classprob_dsc_specmod_binarystar = 0.08940076
classprob_dsc_allosmod_quasar = 0.0
classprob_dsc_allosmod_galaxy = 0.0
classprob_dsc_allosmod_star = 1.0
teff_gspphot = 5569.604
teff_gspphot_lower = 5560.7686
teff_gspphot_upper = 5584.0303
logg_gspphot = 4.0945
logg_gspphot_lower = 4.0932
logg_gspphot_upper = 4.0964
mh_gspphot = -0.6738
mh_gspphot_lower = -0.6896
mh_gspphot_upper = -0.6564
distance_gspphot = 104.0492
distance_gspphot_lower = 103.8292
distance_gspphot_upper = 104.2765
azero_gspphot = 0.0107
azero_gspphot_lower = 0.0035
azero_gspphot_upper = 0.0225
ag_gspphot = 0.009
ag_gspphot_lower = 0.0029
ag_gspphot_upper = 0.0188
abp_gspphot = 0.0113
abp_gspphot_lower = 0.0036
abp_gspphot_upper = 0.0237
arp_gspphot = 0.0064
arp_gspphot_lower = 0.0021
arp_gspphot_upper = 0.0135
ebpminrp_gspphot = 0.0049
ebpminrp_gspphot_lower = 0.0015
ebpminrp_gspphot_upper = 0.0102
mg_gspphot = 3.6883
mg_gspphot_lower = 3.6776
mg_gspphot_upper = 3.6963
radius_gspphot = 1.7128
radius_gspphot_lower = 1.708
radius_gspphot_upper = 1.7172
logposterior_gspphot = -922.7301
mcmcaccept_gspphot = 0.5040439
libname_gspphot = MARCS
ew_espels_halpha = 0.13849546
ew_espels_halpha_uncertainty = 0.22677948
ew_espels_halpha_flag = 0
ew_espels_halpha_model = 0.096581
flags_esphs = 93
spectraltype_esphs = G
activityindex_espcs_input = M1
radius_flame = 1.6710684
radius_flame_lower = 1.6371968
radius_flame_upper = 1.7052681
lum_flame = 2.4219515
lum_flame_lower = 2.4059958
lum_flame_upper = 2.4429812
mass_flame = 1.0303388
mass_flame_lower = 0.99025804
mass_flame_upper = 1.0704259
age_flame = 9.894006
age_flame_lower = 8.968169
age_flame_upper = 10.813577
flags_flame = 00
evolstage_flame = 458
gravredshift_flame = 0.48215786
gravredshift_flame_lower = 0.48119697
gravredshift_flame_upper = 0.48337322
bc_flame = 0.033430774
mh_msc = -0.20104402
mh_msc_upper = -0.079544276
mh_msc_lower = -0.33244783
azero_msc = 0.3712377
azero_msc_upper = 0.8078572
azero_msc_lower = 0.0
distance_msc = 104.14586
distance_msc_upper = 106.67035
distance_msc_lower = 101.67836
teff_msc1 = 5449.953
teff_msc1_upper = 5792.9707
teff_msc1_lower = 5092.4287
teff_msc2 = 5753.5703
teff_msc2_upper = 6105.162
teff_msc2_lower = 5331.041
logg_msc1 = 4.282155
logg_msc1_upper = 4.4209576
logg_msc1_lower = 4.15431
logg_msc2 = 4.524822
logg_msc2_upper = 4.8650837
logg_msc2_lower = 4.3242216
ag_msc = 0.30308014
ag_msc_upper = 0.65604216
ag_msc_lower = 0.0
logposterior_msc = 233.69319
mcmcaccept_msc = 0.23357995
mcmcdrift_msc = 0.039160296
flags_msc = 0




Observation Date:


Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2026. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.


Acknowledgements
The Double Star Calculator makes use of data from the European Space Agency (ESA) mission Gaia, processed by the Gaia Data Processing and Analysis Consortium (DPAC). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Additionally, it incorporates data from the Washington Double Star Catalog, maintained at the U.S. Naval Observatory, and makes use of the Aladin Sky Atlas developed at CDS, Strasbourg Observatory, France.


Report Information
Double Star Calculator: Version 1.2 ($Rev: 2591 $)
Report created: 2026-09-09 08:16:10 +0200



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